Question

我是Django的新手，使用的是2.0版本。根据“Django by Example”一书开始构建“商店”应用程序。但是这本书使用的是django 1.8版本。问题是，当我浏览http://127.0.0.1:8000/时会出现此错误：

“NoReverseMatch at / 使用参数'（None，'alpina'）'找不到'product_detail'的反转。尝试了1种模式：['（？P \ d +）/（？P [ - \ w] +）/ $']“。

'alpina'是我从管理站点添加的产品名称。

以下是我的应用的urls.py：

from django.conf.urls import url
from . import views

app_name='shop'
urlpatterns = [
    url(r'^$', views.product_list, name='product_list'),
    url(r'^(?P<category_slug>[-\w]+)/$',
        views.product_list,
        name='product_list_by_category'),
    url(r'^(?P<id>\d+)/(?P<slug>[-\w]+)/$',
        views.product_detail,
        name='product_detail'),
]

以下是我的应用的models.py：

from django.urls import reverse
from django.db import models

class Category(models.Model):
    name = models.CharField( max_length=200,
                             db_index=True )
    slug = models.SlugField( max_length=200,
                             db_index=True,
                             unique=True )

    class Meta:
        ordering = ('name',)
        verbose_name = 'category'
        verbose_name_plural = 'categories'

    def __str__(self):
        return self.name

    def get_absolute_url(self):
        return reverse( 'shop:product_list_by_category',
                        args=[self.slug] )

class Product(models.Model):
    category = models.ForeignKey( Category,
                                  related_name='products',
                                  on_delete=models.CASCADE
                                  )
    name = models.CharField( max_length=200, db_index=True )
    slug = models.SlugField( max_length=200, db_index=True )
    image = models.ImageField( upload_to='products/%Y/%m/%d',
                               blank=True )
    description = models.TextField( blank=True )
    price = models.DecimalField( max_digits=10, decimal_places=2 )
    stock = models.PositiveIntegerField()
    available = models.BooleanField( default=True )
    created = models.DateTimeField( auto_now_add=True )
    updated = models.DateTimeField( auto_now=True )

    class Meta:
        ordering = ('name',)
        index_together = (('id', 'slug'),)

    def __init__(self, *args, **kwargs):
        super().__init__( *args, **kwargs )
        self.id = None

    def __str__(self):
        return self.name

    def get_absolute_url(self):
        return reverse( 'shop:product_detail',
                        args=[self.id, self.slug] )

以下是我的项目的views.py：

from django.shortcuts import render, get_object_or_404
from .models import Category, Product

def product_list(request, category_slug=None):
    category = None
    categories = Category.objects.all()
    products = Product.objects.filter(available=True)
    if category_slug:
        category = get_object_or_404(Category, slug=category_slug)
        products = products.filter(category=category)
    return render(request,
                  'shop/product/list.html',
                  {'category': category,
                   'categories': categories,
                   'products': products})

def product_detail(request, id, slug):
    product = get_object_or_404(Product,
                                id=id,
                                slug=slug,
                                available=True)
    return render(request,
                  'shop/product/detail.html',
                  {'product': product})

这是我的项目的urls.py：

from django.conf import settings
from django.conf.urls.static import static
from django.conf.urls import include, url
from django.contrib import admin

urlpatterns = [
    url(r'^admin/', admin.site.urls),
    url(r'^', include('shop.urls', namespace='shop')),
]

Answer 1

从产品型号中删除

 Date date = new Date();
 Calendar calendar = Calendar.getInstance();
 calendar.set(Calendar.DAY_OF_MONTH, CustomDate.date);// your date object.value
 calendar.set(Calendar.YEAR, CustomDate.year); //your date object.value
 calendar.set(Calendar.MONTH, CustomDate.month); //your date object.value
 calendar.set(Calendar.HOUR_OF_DAY, CustomTime.hour); //your time object.value
 calendar.set(Calendar.MINUTE, CustomTime.minute);//your time object.value
 calendar.set(Calendar.SECOND, CustomTime.second);//your time object.value
 System.out.println(calendar.getTime());

尝试了NoReverseMatch 1模式：['（？P <id> \\ d +）/（？P <slug> [ - \\ w] +）/ $']

1 个答案: